I have a large Stratco-type shed in the backyard that is colour-bond clad, 7M x 12M. The colour-bond is looking a bit dated. My thought is to use blue-board and render using the Dulux colour render product.

My question is, do I remove the colour-bond sheets and replace with blue-board by screwing the board to the frame? Or do I clad the colour-bond with blue-board, and if so, how do I fix it to the colour-bond sheeting?